Chapter 2. Firewall Introduction

The Guardian Digital WebTool "Firewall Interface" is based upon "Shorewall", a user interface to the "iptables" utility which controls the network packet filtering code in the Linux kernel. With this the Guardian Digital WebTool "Firewall Interface" will provide everything necessary to setup the EnGarde Secure Linux firewall. You will be able to define zones and networks, default ACCEPT/REJECT policies for each interface, setup internal network masquerading, rules, port forwarding and blacklists.